Vigotec VG-L7 (BX20) - other Software possible?

A few days ago I got my new Vigotec VG-L7 (BX20). But the software works not well. I have problem to import g-code and dxf-files. According to the description, it should be possible to use other software such as GRBL, Benbox, Elekscam. Apparently a new firmware is needed for this. Has anyone used other software on this engraver?

Thanks in advance.